The Andoria System is an binary star system with 5 planets and 3 moons and is located close to Vulcan. In the middle of the 22nd century this spatial proximity was the reason for innumerable conflicts between the Andorian Empire and the Vulcans. The incident on P'jem was the high point of this conflict. Andoria lies likewise relatively close with the Sol System.

Alldor, the main star of the system is an orange star of the spectral class K. Circled by an type A white dwarf. At a middle distance of 3180 mk Andoria I draws its course, a naked rock planet. Next Andoria II at a distance of 8165 follows mk, likewise a hopeless rock world. On the third planet of the system a Andoriani colony as well as mines a mechanism rule in the Topaline ore and Duranium to diminish itself. These mines are natural of large importance for the Andoriani dockyards and for the economy of the homeland world. The next planet is Andoria IV, enormous blue gas ball, which is surrounded by a planetary ring. Andoria IV possesses 3 moons, one of them is Andoria, the homeland world of the Andorianer. The Andorianer under the surface in large cities lives one of ice covered world, for this reason. On Andoria is Andor town center, the imperial guard, the Andoriani academy and the LorPon laboratory. The two other moon are rather normal nature, i.e. neither atmosphere nor seismic activity. However on the third moon Dilithium in a mine is diminished. The last planet is Andoria V, a gas giant, that pulls at a distance of 41686 mk its courses around Alldor.